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Research on Using IMRT Plan for Preoperative Rectal Cancer Patients

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International Journal of Medical Physics, Clinical Engineering and Radiation Oncology 2020年第4期9卷 165-177页

作者： Quang bui Vinh Soai Dang quoc Cuong bui Xuan Toan Hoang Van Truong Vu Radiotherapy Department Hanoi Oncology Hospital Hanoi Vietnam Medicinal Supplies-Medical Physics Division Hanoi Oncology Hospital Hanoi Vietnam

Aims: Research the possibility of using IMRT for rectal cancer patients in preoperative radiotherapy. Methods and Material: The research object is the preoperative radiotherapy plan for rectal cancer patients. The research group made two plans (IMRT, 3DCRT) for each image series of 34 rectal cancer patients who have received preoperative radiotherapy in Hanoi Oncology Hospital;and then compared the dose distribution on PTV, bladder, intestine, femoral bones, the average MU, and QA results of two types of plan. Results: The 95% isodose line and 50% isodose of IMRT plan are closer than those of 3DCRT plan. The average dose of PTV in IMRT plan and 3DCRT plan are 5006 ± 23 cGy and 5036 ± 42 cGy, respectively. The HTCI and HI values of IMRT and 3D plan are 0.97 ± 0.026 and 5.37 ± 1.32;1.00 ± 0.003 and 7.08 ± 0.88. About the dose of organ at risk: The maximum dose, average dose on the right, left femoral head in the IMRT plan are less than those values in the 3DCRT plan (6.2 Gy, 6 Gy, 7.4 Gy, 9 Gy, respectively). The maximum dose and average dose on the bladder of the IMRT plan are smaller than those values of the 3DCRT plan (5.3 Gy, 1.5 times, respectively). The maximum dose and average dose of intestine in the IMRT plan was less than those values in the 3DCRT plan (4.3 Gy, 1.54 times, respectively). The MU number of IMRT plan is 1.5 times bigger than that of 3DCRT plan. Gamma index of IMRT plan is better than that of 3DCRT plan (99% compared with 97%). Conclusions: Using IMRT plan in preoperative radiotherapy for rectal cancer patients can still ensure covered PTV as well as the 3D PLAN. Furthermore, the dose of PTV in the IMRT plan is more uniform than those in the 3D plan, and the dose effect on the OAR surrounding PTV is much lower than when using the 3D plan. When IMRT plan were used to treat the preoperative rectal cancer patients, the LINAC took more time than when using 3DCRT plan.

关键词： Rectal Cancer Preoperative Radiotherapy IMRT HI HTCI Gamma Index

Analyzing Planning Techniques for Whole Brain Radiotherapy

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International Journal of Medical Physics, Clinical Engineering and Radiation Oncology 2020年第1期9卷 1-13页

作者： Soai Dang quoc Quang bui Vinh Cuong bui Xuan Toan Hoang Van Truong Vu Medicinal Supplies Medical Physics Division Hanoi Oncology Hospital Hanoi Vietnam Radiotherapy Department Hanoi Oncology Hospital Hanoi Vietnam

Aims: This study compares data between the Field in Field planning and Wedge planning techniques to figure out which technique has better dose coverage and distribution for PTV, and, if using FiF technique for whole brain treatment, how many beams will have better plan. Methods: 56 patients, who need to radiate whole brain with 30 Gy/10 fractions, have been selected for this study. Four plans have been made for each patient (FiF1—one subfield per field plan, FiF2—two subfields per field plan, FiF3—three subfields per field plan, and a Wedge plan). Results: The results of Field in Field plans including Compare dose distribution on the transverse CT slice, plan evaluation using DVH, number MU of plan, Dmax, HI, HTCI, DmaxPTV, DmeanPTV. Volume of PTV with the dose over 105% prescribed dose, dose of organ at risk, and Quality Assurance (QA) plan, are better than those of Wedge plan. Conclusions: Plans using Field in Field technique has better coverage, is more homogeneous in dose distribution than plan using Wedge technique. When using Field in Field technique for whole brain radiotherapy, using three subfields per field has better result than two subfields per field and one subfield per field.

关键词： Field in Field Whole Brain Radiotherapy HI HTCI Gamma Index

Traditional Vietnamese Medicine between Chinese Heritage and National Tradition

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Chinese Medicine and Culture 2019年第1期2卷 21-25页

作者： Anita bui Department of Medicine Evaluation and Treatment of Pain Centre at Hotel-Dieu and Cochin Hospitals Faculty of Medicine University of ParisLecturer at the University of Paris-Rene DescartesParisFrance

The influence of Chinese medical theory and practice on traditional VietNam medicine in the past is *** can discuss about a Chinese *** Chinese School of Traditional Medicine has trained a large number of Vietnamese *** is,however,throughout the history of medicine in Viet Nam and along with the native genius,the birth of a Vietnamese *** is the part of the heritage in this tradition,what is its own distinctiveness?Hence the title of this article.

关键词： Heritage Hai Thuong Lan Ong(海上懒翁) Northern medicine Southern medicine specificity traditional Chinese medicine Tue tinh(慧静) Vietnamese traditional medicine

Applying Molecular Breeding to Improve Soybean Rust Resistance in Vietnamese Elite Soybean

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American Journal of Plant Sciences 2013年第1期4卷 1-6页

作者： Tran Dang Khanh Truong quoc Anh bui Chi Buu Tran Dang Xuan 2Institute of Agricultural Science for Southern Vietnam Ho Chi Minh City Vietnam Department of Molecular Biology Agricultural Genetics Institute Hanoi Vietnam Graduate School for International Development and Cooperation Hiroshima University Hiroshima Japan Institute of Agricultural Science for Southern Vietnam Ho Chi Minh City Vietnam

Soybean production in Vietnam has recently been threatened by the widespread dissemination of soybean rust (SBR) caused by the fungus Phakopsora pachyrhizi. Application of molecular breeding is considered as a feasible method to improve soybean rust resistance and minimize the adverse effects from overuse fungicides in this country. In this study, we have successfully applied molecular markers in a backcross breeding program to introgress the Rpp5 gene of SBR resistance into HL203, an elite Vietnamese soybean variety, from two donor lines of DT2000 and Stuart 99084B-28. The plants in BC4F1 generation had maximum contribution from the recurrent parents and retained SBR resistance gene.

关键词： Rust Resistant Gene Soybean Marker Assisted Selection Molecular Marker

Genetic diversity in two threatened species in Vietnam:Taxus chinensis and Taxus wallichiana

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Journal of Forestry Research 2017年第2期28卷 265-272页

作者： Dinh Duy Vu Thi Tuyet Xuan bui Minh Tam Nguyen Dinh Giap Vu Minh Duc Nguyen Van Thang bui Xiaohua Huang Yi Zhang College of Forestry Northwest A&F UniversityYangling 712100ShaanxiPeople's Republic of China Vietnam National Museum of Nature Vietnam Academy of Science and Technology(VAST)18 Hoang Quoc VietCau GiayHanoiVietnam Institute of Ecology and Biological Resource(VAST) 18 Hoang Quoc VietCau GiayHanoiVietnam Institute of Natural Products Chemistry(VAST) 18 Hoang Quoc VietCau GiayHanoiVietnam Institute of Forest Biotechnology Vietnam Forestry UniversityXuan MaiChuong MyHanoiVietnam

Taxus chinensis and T. wallichiana in have been threatened in their distribution areas in recent decades because of their over-exploitation and reduction and destruction of native habitats. Determining the genetic diversity in populations of the two species will provide guidelines for their protection and preservation. Two hundred and fifteen trees from six populations of T. chinensis and150 sampled trees of T. wallichiana were sampled. Six microsatellite primer pairs selected from 16 primer pairs were used to investigate genetic variation at the population and species levels. Five yielded polymorphic alleles, and among the 13 putative alleles amplified, 11 were polymorphic（accounting for 76.33 %）.Shannon＇s information index（I） and percentage of polymorphic bands（PPB）（I = 0.202 and PPB = 67.22 % for T. chinensis; I = 0.217 and PPB = 65.03 % for T. wallichiana）. Both species had low levels of genetic diversity（mean Ho= 0.107, He= 0.121 for T. chinensis; Ho= 0.095, He= 0.109 for T. wallichiana）. Genetic differentiation among populations was higher（FST= 0.189） for T. chinensis and lower（0.156） for ***, indicating limited gene flow（Nm） among populations for T. chinensis（0.68） and T. wallichiana（0.65）.Variation among individuals of T. chinensis was 63.59 and73.12 % for T. wallichiana. Thus, the threatened status of the two conifers is related to a lack of genetic diversity. All populations are isolated in small forest remnants. An ex situ conservation site should be established with a new population for these species that comprises all the genetic groups for the best chance to improve their fitness under environmental stresses.

关键词： Taxus populations alleles polymorphic microsatellite Vietnam primer accounting putative destruction

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越南、泰国对中国的大米出口贸易比较研究

越南、泰国对中国的大米出口贸易比较研究

作者：裴国好(bui quoc Hao) 中国地质大学(北京)

学位级别：硕士

大米是人类重要食物、是越南和泰国的主要出口农产品之一,也是国际农产品市场的重要商品。越泰两国的气候条件、地理位置和经济发展水平相对接近。中国在越南和泰国的大米出口贸易中占有很重要的地位。本文首先采用定性分析、贸易竞争... 详细信息

大米是人类重要食物、是越南和泰国的主要出口农产品之一,也是国际农产品市场的重要商品。越泰两国的气候条件、地理位置和经济发展水平相对接近。中国在越南和泰国的大米出口贸易中占有很重要的地位。本文首先采用定性分析、贸易竞争力指数、显示性比较优势指数以及计量经济模型进行比较越南与泰国大米的生产现状、越泰两国大米对中国的出口贸易状况。其二,对越泰两国大米在中国市场的竞争力及其影响因素进行分析,并指出越南大米对中国的出口贸易中存在的问题。最后,为越南大米出口中国提出针对性的政策建议。本论文对规划越南大米出口贸易发展方向、促进中越两国贸易务实合作具有理论意义与现实意义。通过对比分析发现,越南大米对中国出口数量和贸易额有突破性发展,越南大米在中国市场的份额已超过泰国,位居第一。2013年越南对中国大米的净出口达到峰值8.68亿美元,其后始终维持在8亿美元以上的水平,说明越南大米在中国市场的竞争力增强,目前保持在高水平。然而,越南出口大米对中国市场的依存度也明显提高。此外,通过对比分析越、泰大米在中国市场的竞争力发现,目前,随着泰国大米减少对外出口,而越南大米加大对外出口,使得越南大米在中国市场上,无论是从贸易竞争力、显示性比较优势、市场占有率还是净出口,都明显提升。自2012年以来,越南大米在中国市场的竞争力提升明显,大米贸易竞争力指数由负变正,一直在90%之上。2011年起,越南大米出口中国的显示性比较优势指数突然加大并超过了泰国,表明越南大米在中国市场的竞争力由劣势转为优势。越南大米在中国市场所占份额较大,2012年达到66%,其后有所下降,但比例仍然超过50%。与泰国大米相比,越南大米品质和平均价格相当低,会消极影响到越南大米在中国市场的竞争力。因此,本文从提高越南大米质量和竞争力两方面提出了具体政策建议。

关键词：越南大米泰国大米中国比较优势

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中越京族传统文化节日哈节交流研究

中越京族传统文化节日哈节交流研究

作者：裴国玲（bui quoc LINH）云南大学

学位级别：硕士

京族又称越族,是越中两国的跨境民族之一。中国广西壮族自治区东兴市防城港区的江平镇的安南人(京族)是当地的少数民族之一,根据中国2000年全国第六次人口调查的数据显示,该市的京族总人口共有25000人。他们的文化背景特殊,历史上与越... 详细信息

京族又称越族,是越中两国的跨境民族之一。中国广西壮族自治区东兴市防城港区的江平镇的安南人(京族)是当地的少数民族之一,根据中国2000年全国第六次人口调查的数据显示,该市的京族总人口共有25000人。他们的文化背景特殊,历史上与越南沿海居民,尤其是广宁芒街茶古地区人民具有血统关系,彼此经常互相交流。由于历史背景——1887年法-清协定签署之后,两地京族同胞开设分居在两国。实际上,该社区的京族人仍然与越南沿海地区的人民来来往往,直到越中边界冲突事件(1979年)发生之后,两地京族人之间才停止交流。经过中国文化大革命(1966-1976年)和越中边界冲突事件(1979-1991年)这两大时期,江平镇的京族人似乎与自己民族传统文化断绝。1991年两国关系恢复正常之后,在中国政府兴边富民政策的带动下,江平镇京族人开始想要恢复自己民族的文化传统,并开始与越南毗邻的京族同胞密切交往,成为找回自己传统习俗的最佳途径。中国京族人已经接受越南沿海地带的传统文化并将其为自己社区重建传统习俗,在中国55个少数民族当中树立自己的独特特色。本论文的主要研究对象为中国广西壮族自治区东兴市防城港区江平镇京族的民族传统节日——哈节。哈节(又称亭席或亭节)是越中两国京族人最重要的民间信仰活动。该活动已经成为京族人社区的一种具有代表性文化特色。正是因为中国京族人把越南京族人视为具有共同归属,供奉同样的哈亭神灵的兄弟,所以两国关系恢复正常以后,他们已经开始交流、学习并重建哈节。本论文将在四章里分别论述中国京族文化之子分子求知越南哈节各项文化活动并将其运用到自己社区整个过程。这个过程已经导致一种文化折射现象,就是许多京族人以为是传统的文化因素但实际上只是在近几十年来才得以恢复的文化活动。传统并不是呆板模仿的行为而是被继承与创造出来的。从结构理论,文化适应,传统的创造,民族象征理论等文化人类学理论的角度来看,我将尝试将中国京族的哈节里传统文化活动和新建文化活动弄清楚,并希望本文的研究结果能对京族文化发展政策规划管理者提供帮助。

关键词：中国越南京族传统文化哈节跨境交流

Utilization and Satisfaction with HIV Services at 7 Provinces in Vietnam: A Cross-Sectional Study

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World Journal of AIDS 2022年第2期12卷 65-82页

作者： Le Bao Chau Pham Thi Huyen Chang Duong Minh Duc Hoang Van Minh Luu quoc Toan bui Thi Tu Quyen Le Thi Vui bui Thi Thu Ha Hanoi University of Public Health Hanoi Vietnam

The study was carried out to determine utilization and satisfaction with essential HIV services from HIV individuals and high-risk populations in 7 socioeconomic provinces nationwide. A cross-sectional approach was applied in the study. Data were collected through face-to-face interviews using self-report questionnaires. Findings from 2380 respondents indicated a high percentage of utilization as well as a high level of satisfaction, in particular among men who have sex with men (MSM) and female sex worker (FSW) sub-group. Needle, syringe, and condom programs had lower usage and satisfaction mean scores in comparison with other services. The proportion of people who used drugs (PWID) and participated in the needle and syringe program was 53.6%. HIV counseling and testing uptake proportion of overall respondents in the last 12 months was 82.2% while the rate of antiretroviral treatment among infected PWID was 74.9%. The level of satisfaction with treatment services was found to be higher than preventive interventions (p < 0.05). Analysis using univariable logistic regression suggested an association between some socioeconomic factors such as income, employment, educational attainment, and marital status with subjects’ satisfaction with several HIV services. Preventive services, especially needle, syringe and condom programs should be prioritized to scale up the coverage and effectiveness. Innovative approaches targeting at PWID should be promoted to increase their access to prevention programs as well as HIV care when needed.

关键词： HIV Service Utilization Satisfaction

Calibration of a neutron dose rate meter in various neutron standard fields

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Nuclear Science and Techniques 2020年第6期31卷 75-82页

作者： Tuan Khai Nguyen Hoai-Nam Tran Quynh Ngoc Nguyen Thi My Linh Dang Van Loat bui Thiansin Liamsuwan Ngoc-Thiem Le Vietnam Agency for Radiation and Nuclear Safety 113 Tran Duy HungHanoi 100000Vietnam Institute of Fundamental and Applied Sciences Duy Tan UniversityHo Chi Minh 700000Vietnam Faculty of Natural Sciences Duy Tan University3 Quang TrungDa Nang 550000Vietnam Institute for Nuclear Science and Technology VINATOM179 Hoang Quoc VietHanoi 100000Vietnam Faculty of Physics VNU University of Science334 Nguyen TraiHanoi 100000Vietnam Nuclear Research and Development Division Thailand Institute of Nuclear TechnologyOngkharakNakorn NayokThailand 7 Faculty of Medicine and Public HealthHRH Princess Chulabhorn College of Medical ScienceChulabhorn Royal AcademyBangkokThailand

This paper presents the calibration of a neutron dose rate meter and the evaluation of its calibration factors(CFs)in several neutron standard fields(i.e.,two standard fields with bare sources of252Cf and241Am-Be,and five simulated workplace fields with241Am-Be moderated sources).The calibration in standard fields with bare sources was conducted by following the recommendations of the ISO 8529 *** measured total neutron ambient dose equivalent rates,denoted as H*(10)tot,were analyzed to obtain direct components,denoted as H*(10)dir,using a reduced fitting *** CF was then calculated as the ratio between the conventional true value of the neutron ambient dose equivalent rate in a free field,denoted as H*(10)FF,and the value of H*(10)*** contrast,in the simulated workplace neutron fields,the calibration of the neutron dose rate meter was conducted by following the ISO 12789 *** CF was calculated as the ratio between the values of H*(10)totmeasured by a standard instrument(i.e.,Bonner sphere spectrometer)and the neutron dose rate *** CF values were obtained in the range of 0.88–*** standard uncertainties(k=1)of the CFs were determined to be in the range of approximately 6.6–13.1%.

关键词： Neutron standard fields Neutron dose rate meter Calibration factor 252Cf source 241AmBe source